murpffy



APPLICATION FILED MAY 27, 191B.

Patented Aug. 3, 1920.

2 SHEETS-SHEET 2. 4

PETER W. MURPHY, OF DETROIT,

MICHIGAN, ASSIGNOR TO THE MURPHY ENGI- NEERING- COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

GUIDEWAY AND SLIDING MEMBER THEREFOR.

Specicaton of Letters Patent.

Patented Aug. 3, 1920.

Application led May 27, 1918. Serial No. 236,754. Y

To all 'Lc/to m it may co acera Be it known that I. PETER W. MURPHY, a citizen of the United States, residing at Detroit, county of lVayne, State of Michigan, have invented a certain new and useful Improvement in Guideways and Sliding Members Therefor, and declare the following to be a full, clear,` and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to guideways and sliding members therefor, as for instance yokes for pistons of a multiple cylinder type of engine in which the cylinders are arranged in a circle with the longitudinal axes in parallel relation with a central shaft provided with a cam adapted to be rotated by reciprocation of pistons in the cylinders. A particular object of the invention is to provide a solid and substantial guideway for a sliding member that is of long life; that may be Jformed in the supporting body dispensing with the usual attachable side members and adapted to rigidly hold the member to reciprocal movement without possibility of lateral displacement. The general objects and the several novel features of the invention are hereinafter more fully described and claimed and shown in the accompanying drawings in which- Figure l is a view partly in section showing my improved guideway and slide in use in an engine of multi-cylinder type.

Fig. 2 is a cross section on line -:v of Fig. l showing the supporting case and mode of forming the guideways therein.

Fig. 3 is a detail of the slide having the t'orm of a yoke and showing the oonoidal rollers engaging the cam and mode of attaching the piston rods thereto.

This character of guideway and member traveling therein may be used in a variety of mechanisms wherein it is desired to hold the reciprocated part fixedly to a definite line of movement without possibility of lateral displacement and in which it is desired to dispense with the usual attachable guide members.

Heretofore it has been the practice to form a guideway one side of which is pro- D the body of which vided by an attachable part undercut to correspond with the opposite side member and in practice I have found that if excessive side strains are imposed on the sliding member the said attached part tends to loosen allowing lateral displacement of the side member which becomes noisy in operation and in tact detrimental to efficient operation of the parts.

In the accompanying drawings I have shown one type of mechanism with which this character of guideway and sliding member may bc utilized. The device shown is a multi-cylinder engine having a series of cylinders 1 arranged in a circle about a center with the longitudinal axis of the cylinders parallel with the axis about which they are positioned and on which axis is positioned a drive shaft 2. On this shaft 2 is a cam 3 Apositioned forward on the inner ends of the cylinder and by means of which the power of the cylinder is applied to the shaft to rotate the same. Although not here shown there are two sets of cylinders at opposite ends oi the cam, the pistons in directly opposite cylinders of the sets being connected to a yoke 4 which yoke carries the conoidal rollers 5 engaging opposite sidesl of the cam 3. The opposing cylinder castings are connected by a central cylindrical casting 6 which ineloses the cam member and this central casting is formed with a series of cylindrical longitudinally extending grooves 7 the grooves being formed and extend from one end of the casting to the other opening through the said ends. These grooves, as will be understood from Fig. 2, are arranged in pairs, lthere being two grooves for each pair of opposed cylinders. In these grooves is the sliding member 4 is formed of two semi-circular portions 9 and 10 connected together and rising from the cylindrical portion as a base are the two standards 11 and 12 on opposite ends providing supports for the conoidal rollers 5 as shown in Fig. 3. Each pair of grooves 7 open into the central portion of the chamber, the wall of which is4 cut out as indicated at 14 to allow the standards 1l and 12 to extend into the chamber and be moved longitudinally thereof, the opening 14 in the arrangement here shown being on the axis of opposed cylinders at opposite ends of the casting 6 and the Width of the opening?r l-l being slightly greater than the width of the standards ll or l2.

By the arrangement described with the two eireular portions 9 and 10 riding in each pair ot' grooves T (which grooves are greater than a halt' circle in forni providing a oent 'al portion l5 extending centrally into the slide between the eylindrieal portions thereof) there is no possibility ot' the slide roekinl in the support or moving laterally relative to the axis o the cylinders thus providing a very solid and secure support for the slide and dii-:pensiirgr with the usual attach-able parts as heretofore stated. These grooves being eut or formed in the eastingf and opening` through the end members the slide members may be introduced into the grooves at the end. The opposite ends oi the slide are provided with bosses 1G and iT prei'erabliv threaded to receive the piston rods ol the pistons in the opposed cylinders i-oinpanion thereto.

Yo attempt is here niade to show the various operating parts ol' the engine, it bein;r suiiicient so tar as disclosure of this invention is concerned to state that the opposingr pistons are tixedly connected together by means of this yoke or slide and by reason ot the explosions alternately in opposite cylinders the yoke is made to reeiproin the gnideway and by reason of the euizigenient ot the rollers with the cam rotation of the central sha t't is produeed. By torre applied to one piston for instance there is a tendene);v for the volte to more sidewise lne to the form ol the Cam and this slide and guideway is devised to securely hold he yoke and prevent any lateral displacenient.

Villiile l have shown the eono'idal rollers carried b v the yoke or slide 8. they are here shown to illustrate a slide member in which a side pressure is exerted during longitudinal movement of the slide member in the way. it being understood that the said slide and 'raie gnideway therefor may be used with Yvarious eonstrnctions, as cross heads and the like, within the spirit otthis invention.

A piston rod supporting gaiilep'ay therefor comprising a slidzible member having' two eonnected eylindrieal portions with a central depression between rhein` and a slideway comprit-Ling` two semicircular grooves adapted to lit said cylindriportions and having a central portion which extends into said central depression between the eylindrieal portions of the slide.

A device ol' the eharaeter described f-oniprisingr a guideway havingI two substaniiailv semieircular grooves separated by a central projeeting portion, and a piston rod supporting; member haring two eonneeted cyiindrical portionsl with a central depression between them adapted to accommodate said pioiectiiipr portion,y said slide supporting' a pair o'lf eonoidal rollers adapted to engage a cani for rotating the cam as the member reeiproeates in said guidewav.

Il. piston rod supporting;1 slide and ,fuidevvay therefor comprising' a sliduble nieniber having two connected portions with a ventral depression between them, and a .ideway comprising two grooves adapted to iii said portions and havingr a central portion which extends into said central depres- ;--ion between the portions ot the slide.

l'. device ot the ebaraeter described J1appris-ing a guideway having;` two grooves `lloperated by a central projecting portion, sa piston rod sul'iportiupr member havtwo connected portions with a central i 'essieu between them adapted to accommii-,iate said projecting portion. said sli-de upporting a pair o? conoidal rollers adapty-Vl to engage a cani Jfor rotating the eam as the piston rod supporting member reeiprors in said guideWa-y.

ln testimoni7 whereof.

cation.

PETER Vil. MURPHY.

slide and sign this specili- 

